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Search Results: 1 - 10 of 32828 matches for " Pereira Filho "
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Energy Balance in a Patch of the Atlantic Forest in São Paulo City, Brazil  [PDF]
Frederico Luiz Funari, Augusto José Pereira Filho
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.69076
Abstract:

The aim of this work was to characterize and to bring into relationship of the net radiation with the latent heat flux equivalent to water (mm) in a patch of Atlantic Forest within the metropolitan area of Sao Paulo (RMSP). The estimation of the latent heat flux (LE) was made by the energy balance equation with the Bowen ratio. Measurements of net radiation and psychometrics gradients were made. Soil heat flux (G) was measured by temperature sensors in two depths. Measurements were made at Park of Science and Technology of Sao Paulo University (CIENTEC), Sao Paulo, Brazil, between 2011 and 2013. Results indicated that evapotranspiration varies seasonally and the amount of water evaporated exceeds 3.0 mm·day-1 in spring/summer and in autumn/winter the amount is approximately 1.0 mm·day-1. The evapotranspiration is increased under RMSP urban climate conditions with higher air temperature and lower moisture especially in summer season.

A Embratel: da era da interven??o ao tempo da competi??o
Pereira Filho, José Eduardo;
Revista de Sociologia e Política , 2002, DOI: 10.1590/S0104-44782002000100004
Abstract: this article looks at brazilian telecommunications policies over the last thirty five years. its specific focus is the process of formation and consolidation of the empresa brasileira de telecomunica??es (embratel). emphasis is placed on the decision-making processes of the sixties, when the sector underwent a profound institutional and organization change favorable to direct state action that corresponded to the developmentalist ideals of the period. i look at the technological leap that embratel promoted over the 60s, 70s and 80s through the implantation of the national telecommunications system (sistema nacional de telecomunica??es), which linked the country up ? domestically and internationally ? through telecommunications. finally, i analyze the process of privatization of telecommunications that took place over the second half of the nineties as part of the program for the economic reform of the brazilian state. this created the current scenario of competition regulated by the state through the national agency of telecommunications (agência nacional de telecomunica??es ? anatel).
A mobile X-POL weather radar for hydrometeorological applications in the metropolitan area of S o Paulo, Brazil
A. J. Pereira Filho
Geoscientific Instrumentation, Methods and Data Systems (GI) & Discussions (GID) , 2012, DOI: 10.5194/gi-1-169-2012
Abstract: This paper presents the first mobile X-band dual-polarization Doppler weather radar termed MXPOL operated by the Laboratory of Hydrometeorology (LABHIDRO) of the University of S o Paulo, S o Paulo, Brazil. It is used in graduate and under graduate courses, real-time monitoring and nowcasting of severe weather in the Metropolitan Area of S o Paulo (MASP). It is one of the first of its kind to be used operationally to provide real-time high spatial resolution polarimetric data. MXPOL is an important component of a Hydrometeorological Forecast System (Pereira Filho et al., 2005) for MASP. This manuscript presents some instances of MXPOL polarimetric measurements of weather systems and their respective microphysical, dynamical and boundary layer features that can improve nowcasting.
A atua o do movimento sindical junto ao Fórum Nacional do Trabalho
Haroldo Pereira Fernandes Filho
Sociedade e Estado , 2008, DOI: 10.1590/s0102-69922008000200014
Abstract:
A mobile X-POL weather radar for hydrometeorological applications in the metropolitan area of S o Paulo, Brazil
A. J. Pereira Filho
Geoscientific Instrumentation, Methods and Data Systems Discussions , 2012, DOI: 10.5194/gid-2-177-2012
Abstract: This paper presents the first mobile X-band dual-polarization Doppler weather radar termed MXPOL operated by the Laboratory of Hydrometeorology (LABHIDRO) of the University of S o Paulo, S o Paulo, Brazil. It is used in graduate and under graduate courses, real time monitoring and nowcasting of severe weather in the Metropolitan Area of S o Paulo (MASP). It is one of the first of its kind to be used operationally to provide real time high spatial resolution polarimetric data. MXPOL is an important component of a Hydrometeorological Forecast System (Pereira Filho et al., 2005) for MASP. This manuscript presents some instances of MXPOL polarimetric measurements of weather systems and their respective microphysical, dynamical and boundary layer features that can improve nowcasting.
A Embratel: da era da interven o ao tempo da competi o
Pereira Filho José Eduardo
Revista de Sociologia e Política , 2002,
Abstract: O artigo trata da política brasileira de telecomunica es nos últimos trinta e cinco anos. Enfoca, em especial, o processo de constitui o e consolida o da Empresa Brasileira de Telecomunica es (Embratel). Enfatizamos que o processo decisório ocorrido nos anos 60, quando o setor passou por uma profunda mudan a institucional e organizacional favorável à atua o direta do Estado, correspondeu ao ideário desenvolvimentista. Retratamos o salto tecnológico promovido pela Embratel ocorrido ao longo das décadas de 60, 70 e 80 por meio da implanta o do Sistema Nacional de Telecomunica es, o que possibilitou a liga o do país pelas telecomunica es, internamente e com o exterior. Por fim, analisamos o processo de privatiza o das telecomunica es ocorrido ao longo da segunda metade dos anos 90, como parte do programa de reforma econ mica do Estado brasileiro. Configura-se ent o um quadro de competi o regulada pelo Estado através da Agência Nacional de Telecomunica es (Anatel).
Sig na internet: exemplo de aplica o no ensino superior
Alfredo Pereira Queiroz Filho
Revista do Departamento de Geografia , 2002, DOI: 10.7154/rdg.v0i15.67
Abstract: Este trabalho relata o uso do software SpringWeb no curso de Introdu o à Cartografia, ministrado no primeiro semestre de 2002aos alunos do Departamento de Geografia da Universidade de S o Paulo, e aborda os principais aspectos da integra o de dados que lhe d osuporte. As possibilidades de trabalhar fora do horário e local de aula, associar os conceitos básicos de Cartografia e minimizar oinvestimento em software e hardware s o consideradas as principais vantagens dessa aplica o. As desvantagens mais relevantes sereferem ao heterogêneo conhecimento de informática dos alunos, à necessidade de uso de banda larga para acessar o exercício e àexigência de instala o – no primeiro acesso – de um plug-in (programa Java).
Summer convection in urban environments and the flash floods
Pereira Filho Augusto J.
Anais da Academia Brasileira de Ciências , 2000,
Abstract:
Applicability of Data Mining Technique using Bayesians Network in Diagnosis of Genetic Diseases
Hugo Pereira Leite Filho
International Journal of Advanced Computer Sciences and Applications , 2013,
Abstract: This study aims to identify a methodology to aid in the identification of diagnosis for chromosomal abnormalities and genetic diseases, presenting as a tutorial model the Turner Syndrome. So, it has been used classification techniques based in decision trees, probabilistic networks (Na ve Bayes, TAN e BAN) and neural MLP network (Multi-Layer Perception) and training algorithm by error retro-propagation. Described tools capable of propagating evidence and developing techniques of generating efficient inference techniques to combine expert knowledge with data defined in a database. We have come to a conclusion about the best solution to work out the show problem in this study that was the Na ve Bayes model, because this presented the greatest accuracy. The decision - ID3, TAN e BAN tree models presented solutions to the indicated problem, but those were not as much satisfactory as the Na ve Bayes. However, the neural network did not promote a satisfactory solution.
Scintillation Characteristics of CsI Crystal Doped Br under Gamma and Alpha Particles Excitation  [PDF]
Maria da Concei??o Costa Pereira, Tufic Madi Filho
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.56042
Abstract:

Inorganic scintillators play an important role in detection and spectroscopy of gamma, X-rays and alpha particles as well as neutrons and charged particles. Scintillation crystals based on cesium iodide (CsI) are matters with relatively low hygroscopicity, high atomic number, easy handling and low cost, characteristics that favor their use as radiation detectors. In this work, pure CsI crystal and bromine doped CsI crystals were grown using the Bridgman technique. The concentration of the bromine doping element (Br) was studied in the range of 1.5 × 10-1 M to 10-2 M. The distribution of the doping element in the crystalline volume was determined by neutron activation. The result obtained with neutron activation analysis (NAA) has found that the mean values of Br found in grown crystals are consistent with those introduced in salt CsI, showing the incorporation of Br in the matrix structure of CsI. The optical transmittance assays were performed at a wavelength range of 110 nm to 1100 nm. Analyses were carried out to evaluate the developed scintillators, concerning alpha particles and gamma radiation.

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